Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

Python
1

Tell us what’s happening:

I don’t know what i am doing wrong

Your code so far

def verify_card_number(card_number):
    sum_of_odd_digits = 0
    card_number_reversed = card_number[::-1]
    odd_digits = card_number_reversed[::2]

    for digit in odd_digits:
        sum_of_odd_digits += int(digit)

    sum_of_even_digits = 0
    even_digits = card_number_reversed[1::2]
    for digit in even_digits:
        number = int(digit) * 2
        if number >= 10:
            number = (number // 10) + (number % 10)
        sum_of_even_digits += number
    total = sum_of_odd_digits + sum_of_even_digits
    print(total)
    return total % 10 == 0

# User Editable Region

def main():
    card_number = '4111-1111-4555-1142'
    card_translation = str.maketrans({'-': '', ' ': ''})
    translated_card_number = card_number.translate(card_translation)

    if verify_card_number(translated_card_number):
        print('VALID!')        
    else:     
        print('INVALID!')
    

# User Editable Region

 main()

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Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 33

2

your code passes for me, maybe try resetting the step and writing the code again?

3

allready did that multiple times, don’t know whats wrong

4

if I copy this it passes, if I copy all your code it doesn’t, you may have changed something outside the editable region without meaning to

5

now it works, thanks alot!

6

I wonder how the extra space got there before main() on the last line

def▯main():¬
▯▯▯▯card_number▯=▯'4111-1111-4555-1142'¬
▯▯▯▯card_translation▯=▯str.maketrans({'-':▯'',▯'▯':▯''})¬
▯▯▯▯translated_card_number▯=▯card_number.translate(card_translation)¬
¬
▯▯▯▯if▯verify_card_number(translated_card_number):¬
▯▯▯▯▯▯▯▯print('VALID!')~~~~~~~~¬
▯▯▯▯else:~~~~~¬
▯▯▯▯▯▯▯▯print('INVALID!')¬
~~~~¬
¬
#▯User▯Editable▯Region¬
¬
▯main()¬
7

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